The frontman for a famous rock band who took legal action against Donald Trump followed it up with messages saying it’s not political. Steven Tyler, frontman for Aerosmith, took to social media to explain why he sent a cease-and-desist letter to Trump.

As we reported previously, Tyler took the action after Trump played the Aerosmith song “Livin’ on the Edge” at a rally this week. The letter from Tyler’s legal team says: “Mr. Trump is creating the false impression that our client has given his consent for the use of his music, and even that he endorses the presidency of Mr. Trump.”

Tyler later said in a post on Twitter: “This is not about Dems vs. Repub. I do not let anyone use my songs without my permission. My music is for causes not for political campaigns or rallies. Protecting copyright and songwriters is what I’ve been fighting for even before this current administration took office.”

He later sent out another tweet saying: “This is one of the reasons why @JoePerry and I have been pushing the Senate to pass the Music Modernization Act.”